Have objects affect different Nav-meshes

Hey all,

I am trying to allow players to dynamically place objects that influence navmesh. However, before the player can place these objects i want to check if navigation to possibly blocked-off areas is still possible. These objects should not only block the currently existing nav-mesh (somehting i could have done using NavModifiers) but also generate new nav-mesh (for example on top of a cube) to generate potential new paths.

It is possible to have multiple nav-meshes, but i can’t figure out how to make an object only affect one type of nav-mesh. Switching the “Can Ever Affect Navigation” switches the behavior for all nav-meshes, in my case i would want the object to only affect one particular nav-mesh.

How could I build such a system?

Thanks a million!